If you're on Windows:You put the startup flag into the Desktop shortcut (or Start Menu shortcut) that starts Lugaru.For that, you go into the properties of the shortcut (right-click, properties), and where it says"c:\path\to\lugaru\Lugaru.exe"You change it to"c:\path\to\lugaru\Lugaru.exe -windowed"

If you're on OS X:Open a Terminal: Press CMD-Space and enter "terminal" without quotes, pick the first oneIn the Terminal window, type this:open /Applications/Lugaru.app --args -windowed... and press Enter. This assumes that Lugaru is located at /Applications/Lugaru.appNot sure whether there's an easier way than doing this inside a script or something. There probably is though.

Ah yes, I believe there is a level limit for Lugaru's campaigns. But you could always just split your campaign into two separate campaigns. What I mean is, make one campaign with, for example, 25 levels. Then make a "part 2" campaign with all the other levels. Some of the user-submitted campaigns have had to have been split in two because they are too large. If it's necessary, nobody will care. People will be very glad you have taken the time to make any new maps at all.